18149329724 has 48 divisors (see below), whose sum is σ = 33295147200. Its totient is φ = 8645339136.

The previous prime is 18149329711. The next prime is 18149329733. The reversal of 18149329724 is 42792394181.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4037222 + ... + 4041714.

It is an arithmetic number, because the mean of its divisors is an integer number (693648900).

Almost surely, 2^18149329724 is an apocalyptic number.

It is an amenable number.

18149329724 is a deficient number, since it is larger than the sum of its proper divisors (15145817476).

18149329724 is a wasteful number, since it uses less digits than its factorization.

18149329724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4982 (or 4980 counting only the distinct ones).

The product of its digits is 870912, while the sum is 50.

The spelling of 18149329724 in words is "eighteen billion, one hundred forty-nine million, three hundred twenty-nine thousand, seven hundred twenty-four".